Tuesday, Oct 9, 2012 - 7:00 PMJoanna reaches Khartoum, capital of Sudan, and the confluence of the Blue Nile and the White Nile. She sees whirling dervishes and receives a a traditional beauty treatment called a dukhan. While on a detour in Ethiopia's Simien Mountains, she encounters an unusual group of Olympic hopefuls. Part 3 of 4G